Warrior --> fortified and heavy armor to absorb damage, but higher attack (melee & defense)
Knight --> more fortified than warrior (melee & defense)
Templar --> lots of stamina and massive strength (melee & defense)
Thief --> quick attack and stealth (melee & DPS)
Martial Artist --> hand-to-hand combat (melee & DPS)
Blade Dancer --> damage-per-second and team stat benefits (melee & DPS)
Hunter --> bow & arrow (in some cases a pet or familiar is included) (ranged DPS)
Engineer --> often heavy armour and explosive guns (ranged DPS)
Ranger --> powerful gun-user (ranged DPS)
Cleric --> healer, remove debuffs, revival, fortification (support/healing)
Bard --> guitar-user; healing and attack (support/healing)
Shaman --> immense protection/attack power using spirits (support/healing)
Magician --> burst damage, variety of ways to exploit weaknesses of opponent (magic DPS)
Illusionist --> more offensively-focused version of bard; confuse and weaken enemies; party buff (magic DPS)
Warlock --> debuff enemies, massive attack power against single enemies (magic DPS)